| t2ex/t2ex_source/kernel/sysmain/src/network_sample/net_conf.c | bare source | permlink (0.01 seconds) |
1: /* 2: *---------------------------------------------------------------------- 3: * T2EX Software Package 4: * 5: * Copyright 2012 by Ken Sakamura. 6: * This software is distributed under the latest version of T-License 2.x. 7: *---------------------------------------------------------------------- 8: * 9: * Released by T-Engine Forum(http://www.t-engine.org/) at 2012/12/12. 10: * Modified by TRON Forum(http://www.tron.org/) at 2015/06/04. 11: * 12: *---------------------------------------------------------------------- 13: */ 14: /* 15: * This software package is available for use, modification, 16: * and redistribution in accordance with the terms of the attached 17: * T-License 2.x. 18: * If you want to redistribute the source code, you need to attach 19: * the T-License 2.x document. 20: * There's no obligation to publish the content, and no obligation 21: * to disclose it to the TRON Forum if you have modified the 22: * software package. 23: * You can also distribute the modified source code. In this case, 24: * please register the modification to T-Kernel traceability service. 25: * People can know the history of modifications by the service, 26: * and can be sure that the version you have inherited some 27: * modification of a particular version or not. 28: * 29: * http://trace.tron.org/tk/?lang=en 30: * http://trace.tron.org/tk/?lang=ja 31: * 32: * As per the provisions of the T-License 2.x, TRON Forum ensures that 33: * the portion of the software that is copyrighted by Ken Sakamura or 34: * the TRON Forum does not infringe the copyrights of a third party. 35: * However, it does not make any warranty other than this. 36: * DISCLAIMER: TRON Forum and Ken Sakamura shall not be held 37: * responsible for any consequences or damages caused directly or 38: * indirectly by the use of this software package. 39: * 40: * The source codes in bsd_source.tar.gz in this software package are 41: * derived from NetBSD or OpenBSD and not covered under T-License 2.x. 42: * They need to be changed or redistributed according to the 43: * representation of each source header. 44: */ 45: 46: #include <basic.h> 47: #include <stdio.h> 48: #include <stdarg.h> 49: #include <t2ex/socket.h> 50: 51: #include "network_sample/util.h" 52: #include "network_sample/dhclient.h" 53: #include "network_sample/route.h" 54: 55: #define IPADDR "192.168.0.2" 56: #define NETMASK "255.255.255.0" 57: #define GATEWAY "192.168.0.1" 58: 59: #define DNSSERVER1 "127.0.0.1" 60: //#define DNSSERVER2 "127.0.0.2" 61: //#define DNSSERVER3 "127.0.0.3" 62: #define DNSDOMAIN "localhost.localdomain" 63: 64: #define DEBUG 65: 66: #ifdef DEBUG 67: static void NETDBG(const char *format, ...) 68: { 69: va_list ap; 70: 71: printf("[NET] "); 72: va_start(ap, format); 73: vfprintf(stdout, format, ap); 74: va_end(ap); 75: printf("\n"); 76: } 77: #else 78: #define NETDBG(x, ...) 79: #endif 80: 81: int net_conf_dhcp(void) 82: { 83: /* 84: * Configuration of network addresses using DHCP. 85: * 86: */ 87: NETDBG("Assign INADDR_ANY to Neta before transmitting DHCP packets."); 88: set_ifaddr("Neta", htonl(INADDR_ANY), htonl(INADDR_ANY)); 89: 90: NETDBG("Retrieve network information from a DHCP server."); 91: dhclient("Neta"); 92: 93: return 0; 94: } 95: 96: int net_conf_static(void) 97: { 98: int index; 99: struct sockaddr_in sin; 100: 101: /* 102: * Configuration for the network interface card Neta. 103: * 104: * - Assign a IP address and a broadcast address to Neta. 105: * - Bring up lo0. 106: */ 107: NETDBG("Assign a IP address to Neta."); 108: set_ifaddr("Neta", inet_addr(IPADDR), inet_addr(NETMASK)); 109: NETDBG("Bring up Neta."); 110: if_updown("Neta", 1); 111: 112: /* 113: * Configuration for a default gateway. 114: */ 115: NETDBG("Set a default gateway."); 116: index = so_ifnametoindex("Neta"); 117: route_add(INADDR_ANY, inet_addr(GATEWAY), INADDR_ANY, index, 0); 118: 119: /* 120: * Configuration for DNS servers. 121: */ 122: #if defined(DNSSERVER1) || defined(DNSSERVER2) || defined(DNSSERVER3) 123: NETDBG("Configure DNS."); 124: memset(&sin, 0, sizeof(sin)); 125: sin.sin_len = sizeof(sin); 126: sin.sin_family = AF_INET; 127: #endif 128: #ifdef DNSSERVER1 129: sin.sin_addr.s_addr = inet_addr(DNSSERVER1); 130: so_resctl(SO_RES_ADD_SERVER, &sin, sizeof(sin)); 131: #endif 132: #ifdef DNSSERVER2 133: sin.sin_addr.s_addr = inet_addr(DNSSERVER2); 134: so_resctl(SO_RES_ADD_SERVER, &sin, sizeof(sin)); 135: #endif 136: #ifdef DNSSERVER3 137: sin.sin_addr.s_addr = inet_addr(DNSSERVER3); 138: so_resctl(SO_RES_ADD_SERVER, &sin, sizeof(sin)); 139: #endif 140: 141: #ifdef DNSDOMAIN 142: so_resctl(SO_RES_ADD_DOMAIN, DNSDOMAIN, sizeof(DNSDOMAIN)+1); 143: #endif 144: 145: return 0; 146: } 147: 148: /* 149: * This function configures 150: * - IP addresses of the loopback device and the network interface card Neta, 151: * - a default gateway, and 152: * - DNS servers. 153: * 154: * argument: 155: * emu: 156: * - zero: initialization for em1d 157: * - non-zero: initialization for emulator 158: * dhcp: 159: * - zero: static 160: * - non-zero: DHCP 161: * 162: */ 163: int net_conf(int emu, int dhcp) 164: { 165: ER ercd; 166: 167: NETDBG("Network initialization."); 168: 169: /* 170: * Configuration for the emulator. 171: * 172: * The LAN driver passes packets to upper layers whose size are larger 173: * than 60 bytes by default, otherwise the driver discards them. The 174: * minimum size 60 bytes is the minimum ethernet frame size without 175: * CRC. So small-sized packets are padded to bring them to this length 176: * before transmission. 177: * 178: * But it can be possible to receive packets whose size smaller than 179: * 60 bytes by using a TUN device, because paddings are usually 180: * inserted into those small packets by a network adapter and packets 181: * do not go thorugh a network adapter when they are directly received 182: * from or sent to a TUN device. 183: * 184: * So we have to change the minimum packet size then we use the QEMU 185: * emulator which uses a TUN device. 186: */ 187: if (emu != 0) { 188: NETDBG("Set the minium packet size to 42 byte for using emulator."); 189: netdrv_set_minpktsz("Neta", 42); 190: } 191: 192: /* 193: * Configuration for the loopback device lo0. 194: * 195: * - Assign a local address 127.0.0.1 to lo0. 196: * - Bring up lo0. 197: */ 198: NETDBG("Assign 127.0.0.1 to lo0."); 199: set_ifaddr("lo0", htonl(INADDR_LOOPBACK), inet_addr("255.0.0.0")); 200: NETDBG("Bring up lo0."); 201: if_updown("lo0", 1); 202: 203: /* 204: * Configuration for the network interface card Neta. 205: * 206: * - Attach a device driver Neta. 207: * - Assign an IP address to Neta. 208: * - Set a default gateway address. 209: * - Set DNS servers. 210: */ 211: NETDBG("Attach a device driver Neta."); 212: ercd = so_ifattach("Neta"); 213: if (ercd < 0) { 214: return ercd; 215: } 216: if (dhcp) { 217: net_conf_dhcp(); 218: } 219: else { 220: net_conf_static(); 221: } 222: 223: /* 224: * Configuration for the host table. 225: * 226: * - Add an entry for "localhost" whose IP address is 127.0.0.1. 227: */ 228: NETDBG("Add an entry for localhost into the host name table."); 229: add_hosttable("localhost", htonl(INADDR_LOOPBACK)); 230: add_hosttable("test", inet_addr("127.0.0.2")); 231: 232: return 0; 233: }